tree-wide: fix assorted typos all over the place

That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/block/blk-iopoll.c b/block/blk-iopoll.c
index ca56420..58916af 100644
--- a/block/blk-iopoll.c
+++ b/block/blk-iopoll.c
@@ -28,7 +28,7 @@
  * Description:
  *     Add this blk_iopoll structure to the pending poll list and trigger the
  *     raise of the blk iopoll softirq. The driver must already have gotten a
- *     succesful return from blk_iopoll_sched_prep() before calling this.
+ *     successful return from blk_iopoll_sched_prep() before calling this.
  **/
 void blk_iopoll_sched(struct blk_iopoll *iop)
 {